Annealing pot



Aug. 4, 1931. c. A. FINN 1,816,930

ANNEALI NG POT Filed July 8. 1930 V WEEK/W2 7%? 6716026 Patented Aug. 4, 1931 UNITED. STATES PATENT OFFICE CHARLES A. FINN, OF RACINE, WISCONSIN, ASSIGNOR TO BELLE CITY MALLEABLE 7 IRON COMPANY, OF RACINE, WISCONSSIN, A CORPORATION OF WISCONSIN ANNEALING row Application filed July 8,

The invention relates generally to improvements in annealing pots.

' As is well known in the art, these pots are loaded with parts to beannealed and then B'stacked one above the other in tier formation and in such tiered formation, usually four high, the pots are placed in an annealing kiln where they are subjected to the action of fire which subjects the pots to unusual con ditions detrimental to the life and period of usefulness of such pots. For instance, the heat causes expansion and subsequent cooling causes contraction. Oxidization of the exterior faces of the pot also results and the repeated scaling off eventually so weakens the pots that when stacked and loaded as above stated, the result follows that the sides of the pots, especially the lower ones in the tiers, bulge and belly outwardly. Eventually this distortion through repeated heats changes the shape of the pots to such an extent that they cannot be stacked one above the other without having an upper pot fall into a lower pot and rest on the contents of the lower pot. Use of distorted pots is obviously, therefore, highly objectionable.

More particularly, then, the present invention relates to improvements for annealing pots which will overcome the objections and solve the problems just elaborated.

Specifically the objects of the invention are to provide a cornerpost structure for the pots, and each post at its top to include a pad, the purpose being to take strain from the side walls and put a resistance in corners soas better to carry the load of upper pots in a stack. Other objects will become apparent to those skilled in this art as the disclosure progresses.

In the accompanying sheets of drawings illustrating a preferred, practicable example of the invention Figure 1 is a side elevation. of a stack of two of the improved pots;

Figure 2 is a detail, vertical sectional view through a stack of pots as viewed along the line 22 of Figure 3, looking in the direction of the arrows;

Figure 3 is a plan View of the pot; and,

1930. Serial No. 466,435.

Figure 1 a corner detail in horizontal section as seen along the line 1% of F1gure 2, looking downwardly as indicated by the arrows.

The pot in practice preferably is made as adjoining lower pot as shown in Figure 2.

Trunnions 15 are formed at opposite corners for convenience in handling of the pots.

So much of the pot described is quite conventional. In resting one pot on another the walls of the lower pot carry a considerable load, and as use causes scaling off and thinning with subsequent loss of strength, the pots warp outwardly to such an extent they can no longer be stacked. To solve this problem, each corner of the pot is integrally formed with a vertical corner post or column 16, the post tops lying in a horizontal plane slightly higher than the top line of the walls 10 and 11 to form rests or pads 17 which extend into the corner and connect with the outward and upward flare 14. Obviously. when stacking these improved pots the lower leg flange 13 of a top pot cannot rest directly on the Walls 10, 11 of a bottom pot, but instead the load is carried directly on the pads 17 formed on top of the corner posts 16. The clearance space between the leg flange of a top pot and the upper edge of the Walls of a bottom pot is clearly shown at 18. This feature is highly important then, because the weight is entirely supportedby the relatively strong corner posts 16 and the side and end walls are relieved of weight carrying duty.

pads take strain from the side and end walls and exert a resistance against excess expansion of the Walls.

From the above detailed disclosure it Will 7 now be appreciated that'a'n improved annealing pot has been provided which achieves the desiredobjects heretofore recited. V 1

It is the intention to cover all such changes v and modifications of theillustrative example 7 herein shown asdo not depart from the spirit and scope of the invention as hereinafter rclaiined.

WVhat is claimed is:

'1. An integrally formed annealing pot having side and end Walls forming corners, a raised bottom for the pot leaving a leg flange,

an outwardly'and "upwardly flared flange around the top edge of the ,pot Walls, a

flange mentioned.

thickened portion in each cornerforining a 7 post, each said post extended upwardly a distance above the top edge of the Walls to form a raised pad, and each pad extending over the adjacent Wall parts and connected I to the flared flange mentioned.

2. An integrally formed annealing pot having side and'endwalls forming corners a bottom, an outwardly and upwardly, flared flange around the top edge of the potwalls,

a thickened portion in each inside corner forming apost, each said post extended upwardly a distance above the top edge of the Walls to form a pa d, and each pad extending over the adjacent Wall-parts and integrally connected, to the upward part of the flared I CHARLES A; FINN. 

